Apple's Stupid Right Click

As clever and simple their other designs are,

One of Apple's stupidest design decisions is the lack of a right click (mouse or trackpad) button.

Everywhere in the OS and application more than often require a right click.

Can someone enlighten me as to why Apple has decided to omit such a crucial thing?

EDIT: I have not used the Magic Mouse so I didn't know there was a right click. Apologies for my ignorance.